feat: move commercial check to pyhelper and fix templates

[shawaj]

Issue

• Link: several
• Summary: move commercial check to pyhelper and fix templates

How

• move commercial check to pyhelper
• bump pyhelper version
• add commercial check to before_request and pull into views (decided not to use before_request and g.commercial in the end as needed serial number from diagnostics dict anyway so was better to do it that way)
• fix tests
• add bobcat px30 to commercial fleets
• pull diagnostics into views where necessary for sidebar dashboard link
• use timestamp query string on mysterium iframe load to force-refresh

Screenshots

References

Closes: #602 Closes: #606 Closes: #576 Ref: https://github.com/NebraLtd/hm-pyhelper/pull/267

Checklist

• [x] Tests added
• [x] Cleaned up commit history (rebase!)
• [x] Documentation added
• [x] Thought about variable and method names

[sonarcloud[bot]]

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